Well, you better read the fine print. I read somewhere that the Panasonic 1080p is limited to 1024x768 on the VGA input. You only get the full 1080x1920 on the HDMI input.
If you don't have an XBOX 360 elite, which has HDMI, you may not be able to get the full 1080p resolution.
Regardless, for $400 I would go with 1080p.
Be sure to check Amazon.com, they have the best pricing on the Panasonic and Samsung models, and it includes white glove service, shipping and you don't pay tax.